Aerospace Monitoring of Water Quality

Authors

Anatoly A. Gitelson, University of Nebraska - LincolnFollow
Ferenc Szilagyi, Water Resources Research Center, Budapest, Hungary

Date of this Version

1991

Comments

Published in Proceeding of the Geoscience and Remote Sensing Symposium, 1991. IGARSS '91. Remote Sensing: Global Monitoring for Earth Management. DOI: 10.1109/IGARSS.1991.577669. Copyright 1991, IEEE. Used by permission. Pages 75-78, volume 1.

Abstract

The potential of using remote sensing for the detection of chlorophyll-a (CHL), dissolved organic matter (DOM), and suspended matter (SM) concentrations in coastal and inland waters was investigated using measurements of (ir)radiance spectra along with simultaneous earth-reference data. The range of CHL was 0.1 to 350 μg/l, SM was 0.1 to 43 mg/l, and DOM absorption at the 380 nm was 0.1 to 10^-1. Factor and signature analysis reveal allometric relationships between constituent concentrations C and functions of reflectance Z_k of the type C_k = aZ_k^b. Appropriate functions of R were found: Z_chl = R(700)/R(675), Z_sm = R(560)/R(520), and Z_dom = {R(480) + k[R(700)/R(675]}/R(630). The maximum estimation errors were: CHL - 3 μg/l, DOM - 0.065 μgC/l, and SM - 4 mg/l.